"Harm" is also subjective as a concept, because like... I think often about the fact that a surgeon's job is to inflict harm onto others, but this harm is lauded. The same harm done by a non-surgeon would be violence, but the surgeon's harm is viewed as positive, despite how absolutely awful recovering from surgery is (if a full recovery is even possible). To that extent, there are times when something needs to be said, and saying it causes harm, but it's not necessarily a violent or strictly negative harm. Talking about trauma can hurt, but it's often something victims want to do and it's a positive thing to do. Talking about boundaries can lead to awkwardness and resentment, but boundaries need to be established some way or another. Making note of somebody's problematic behavior can hurt the problematic person's feelings, but there's a huge difference between those engaging in "callout culture" and puritan attacks and those who have legitimate good faith concerns and approach with the intention of being accommodating and compassionate.